kronborggymnasterne.dk is a .dk domain served by 2 nameservers (duke.ns.cloudflare.com, kiki.ns.cloudflare.com). It was registered on 30 August 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.50.94 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx1.mailpod15-cph3.g1i.one.com, mx2.mailpod15-cph3.g1i.one.com and 2 more. The zone is not DNSSEC-signed, has no DMARC policy and is reachable over IPv6. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 104.21.50.94 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.159.236 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mx1.mailpod15-cph3.g1i.one.com | 104.37.35.36 | mx1.mailpod15-cph3.g1i.one.com | AS51468 One.com A/S |
| 10 | 300s | mx2.mailpod15-cph3.g1i.one.com | 104.37.35.37 | mx2.mailpod15-cph3.g1i.one.com | AS51468 One.com A/S |
| 10 | 300s | mx3.mailpod15-cph3.g1i.one.com | 104.37.35.38 | mx3.mailpod15-cph3.g1i.one.com | AS51468 One.com A/S |
| 10 | 300s | mx4.mailpod15-cph3.g1i.one.com | 104.37.35.39 | mx4.mailpod15-cph3.g1i.one.com | AS51468 One.com A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 104.21.50.94 |
| 🔶 Autoconfig | 104.21.50.94 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::6815:325e | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3034::ac43:9fec | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.50.94,172.67.159.236 ech=AEX+DQBBhgAgACBBB8Sy1YSXm21VyNkLKkdiXCBC0L6Ha2NNVZImQHVJegAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:325e,2606:4700:3034::ac43:9fec |
| TXT Record |
|---|
| v=spf1 include:_custspf.one.com ~all |
| Policy | Record (kronborggymnasterne.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_custspf.one.com ~all |
| www | 104.21.50.94 172.67.159.236 2606:4700:3030::6815:325e 2606:4700:3034::ac43:9fec (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network kronborggymnasterne.dk: 104.21.50.94 172.67.159.236 2606:4700:3030::6815:325e 2606:4700:3034::ac43:9fec (AS13335) www.kronborggymnasterne.dk: 104.21.50.94 172.67.159.236 2606:4700:3030::6815:325e 2606:4700:3034::ac43:9fec (AS13335) |
| Wildcard | Yes: any name under the zone resolves |
DNS lookups: 1/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.kronborggymnasterne.dk | 8-pzKvDA-NdrvQhLYO4Ht1Zcb-b6ep5NcFX2Uou4uD8 |
| TXT | _acme-challenge.kronborggymnasterne.dk | pxk-Py36VxTy_kLb78Rz34puiLCsolSrOjhzxLjOTVQ |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.mailpod15-cph3.g1i.one.com | DANE-EE · SPKI · SHA-256 | FEA3731F9349938931D39CCE9FCE17B7… |
| SMTP _25._tcp.mx2.mailpod15-cph3.g1i.one.com | DANE-EE · SPKI · SHA-256 | FEA3731F9349938931D39CCE9FCE17B7… |
| SMTP _25._tcp.mx3.mailpod15-cph3.g1i.one.com | DANE-EE · SPKI · SHA-256 | FEA3731F9349938931D39CCE9FCE17B7… |
| SMTP _25._tcp.mx4.mailpod15-cph3.g1i.one.com | DANE-EE · SPKI · SHA-256 | FEA3731F9349938931D39CCE9FCE17B7… |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2417600634 |
| Primary NS (MNAME) | duke.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2000-08-30 |
| Expires | 2027-09-30 (340d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
| Domain | Registrar |
|---|---|
| hgf-gymnastik.dk | Punktum dk A/S (direct) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-24 11:10:09 | 1572ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-10-23 08:47:22 | 651ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-10-19 15:32:29 | 886ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-10-18 14:31:55 | 1710ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-10-17 13:18:10 | 1034ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-10-16 12:57:54 shown | 684ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-09-30 18:01:53 | 2592ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-09-24 17:26:41 | 2543ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-09-10 19:28:38 | 826ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-08-25 05:23:03 | 2044ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-08-18 23:31:32 | 6748ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-08-16 14:26:04 | 4419ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-07-03 14:56:21 | 2976ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-07-01 05:31:22 | 1801ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-06-26 21:10:22 | 822ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-06-21 10:44:47 | 731ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-06-18 00:24:06 | 983ms | 2 NS 2 A 4 MX | 🔓 Insecure |